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过程工程学报 ›› 2016, Vol. 16 ›› Issue (3): 445-451.DOI: 10.12034/j.issn.1009-606X.215352

• 过程与工艺 • 上一篇    下一篇

钒渣焙烧-碱浸提钒工艺焙烧过程机理

孟利鹏 王少娜 杜浩 郑诗礼   

  1. 北京科技大学冶金与生态工程学院 中国科学院过程工程研究所 中国科学院过程工程研究所 中国科学院过程工程研究所
  • 收稿日期:2015-10-14 修回日期:2016-01-06 出版日期:2016-06-20 发布日期:2017-04-28
  • 通讯作者: 孟利鹏

Process Mechanism of Vanadium-containing Slag Roasting and Alkali Leaching

MENG Li-peng WANG Shao-na DU Hao ZHENG Shi-li   

  1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijin Institute of Process Engineering, Chinese Academy of Sciences Institute of Process Engineering, Chinese Academy of Sciences Institute of Process Engineering, Chinese Academy of Sciences
  • Received:2015-10-14 Revised:2016-01-06 Online:2016-06-20 Published:2017-04-28
  • Contact: MENG Li-peng

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被引次数

3

摘要： 对钒渣空白焙烧-碱浸提钒，研究了钒渣中钒的转化和溶出规律. 结果表明，焙烧过程中渣中钒铁尖晶石FeV2O4中的钒逐步氧化成VO2和V2O5，并优先与Ca, Mn和Mg等形成钒酸盐；浸出分为低温浸出和高温浸出，低于180℃只能浸出钒酸盐和钒氧化物，高于180℃可浸出固溶在硅酸钙中的钒，钒浸出率达97.63%.

关键词: 钒渣, 空白焙烧, 碱浸, 钒铁尖晶石, 机理

Abstract: The conversion and dissolution mechanism of vanadium in the process of blank roasting and alkali leaching were studied. The results showed that vanadium in spinel (FeV2O4) was gradually oxidized into VO2 and V2O5, and then formed vanadate by combining with Ca/Mn/Mg. Leaching process ccan be divided into low temperature leaching (T<180℃) and high temperature leaching. Low temperature leaching only extracted vanadate and vanadium oxide, while high temperature leaching (T≥180℃) extracted the vanadium in the form of solid solution in calcium silicate. Vanadium leaching rate in blank roasting and alkali leaching process reached 97.63%, while the rate of traditional process was only 80%. The application of blank roasting and alkali leaching process could realize the high efficiency and clean extraction of vanadium from vanadium-bearing slag.

Key words: vanadium slag, blank roasting, alkali leaching, spinels, mechanism

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